In the pie-chart generator, if there is a wedge pointing straight down,
make sure its text label flows off to the right, not the left.
file: [96595980]
check-in: [bb9c6a6f]
user: drh
branch: trunk,
size: 10392

Add class tags to elements of the piechart so that they can be configured
using CSS. Add appropriate CSS markup to the xekri skin. Merge the xekri
skin into trunk.
file: [02d8189b]
check-in: [f1dd937c]
user: drh
branch: trunk,
size: 10390